It all started as I was just cleaning my golden dollars (from varnish) and the amazing happened. I accidently left on in the vinegar too long! And to my surprise, I started seeing changes in the dollar. I decided to leave it in the vinegar for a few weeks, and the whole manganese gold cover acidic-ally came off, but I couldn't find the cover because it had melted. And to my awareness, I had a copper golden dollar!
All of this instructable is pretty easy, and very cheap!
Step 1: What You Will Need
1. Golden dollar
3. Paper towels
4. A glass container
Step 2: Put Golden Dollar in Vinegar
Exactly that. Fill your glass container with vinegar, and drop in your golden dollar. Leave it for, say, two to three weeks, stirring each day.
Step 3: Take Out and Finish
Take out your golden dollar when it is not so shiny, and has a 'used' look. You have taken off the shiny manganese cover! You are left with a pure copper golden dollar!